Man's role in changing the face of the earth. Edited by William L. Thomas, with the collaboration of Carl O. Sauer, Marston Bates [and] Lewis Mumford. International Symposium on Man's Role in Changing the Face of the Earth, Princeton, N.J., 1955. Thomas, William Leroy, 1920- ed. Human geography Congresses. G56 .I63 1955 333.7 THM Includes bibliographies. Chicago, Published for the Wenner-Gren Foundation for Anthropological Research and the National Science Foundation by the University of Chicago Press 1956. 1956. 1956 Text xxxviii, 1193 p. : eng